Why arrays are fundamental in Ruby - See It in Action

Why arrays are fundamental in Ruby

📖 Scenario: Imagine you are organizing a small library of books. You want to keep track of the titles in the order they arrive. Arrays in Ruby help you do this easily.

🎯 Goal: You will create an array of book titles, add a new book, find how many books you have, and then print the list of books.

📋 What You'll Learn

Create an array called books with three exact book titles

Create a variable called new_book with a specific book title

Add the new_book to the books array

Create a variable called total_books that stores the number of books in the books array

Print the books array

💡 Why This Matters

🌍 Real World

Arrays are used everywhere to keep lists of things like books, songs, or tasks in order.

💼 Career

Understanding arrays is essential for any programming job because they help manage collections of data efficiently.

1

Create an array of book titles

Create an array called books with these exact titles: 'The Hobbit', '1984', and 'Pride and Prejudice'.

Ruby

# Create an array called books with three book titles
# Your code here

Need a hint?

Use square brackets [] to create an array and separate items with commas.

2

Add a new book title

Create a variable called new_book and set it to the string 'To Kill a Mockingbird'.

Ruby

books = ['The Hobbit', '1984', 'Pride and Prejudice']
# Create a variable new_book with the title 'To Kill a Mockingbird'
# Your code here

Need a hint?

Use = to assign the string to the variable new_book.

3

Add the new book to the array

Add the new_book to the end of the books array using the push method.

Ruby

books = ['The Hobbit', '1984', 'Pride and Prejudice']
new_book = 'To Kill a Mockingbird'
# Add new_book to books array
# Your code here

Need a hint?

Use array.push(item) to add an item to the end of an array.

4

Count and print the books

Create a variable called total_books that stores the number of books in the books array using the length method. Then print the books array.

Ruby

books = ['The Hobbit', '1984', 'Pride and Prejudice']
new_book = 'To Kill a Mockingbird'
books.push(new_book)
# Create total_books with the number of books
# Print the books array
# Your code here

Need a hint?

Use array.length to get the number of items. Use puts to print the array.